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@ai teh tarea gat-ent 'ffira Letters Patent No. 81,997, dated September V8, 1868.

IMPROVEMENT Ill MOULDINGMAGHINBS.

@he .5mn-i112 trimm tu in time Enters @anni rub making part nf 'the samt.

TO ALL WHOM IT MAY CONGERN=` Be it known that I, J. P. GROSVENOR, of Lowell, in the county of Middlesex, in the State of Massachusetts,

have invented a new and improved Machine for Plauing and Moulding Irregular Forms; and I do hereby declare that the following is a full, clear, andexact description of thecon'struction and operation of the same, reference being had to the annexed drawings, making a part of thil specification, in which- Figure is a side elevation.

Figure 2 is a vertical cross-section.

Figure 3 is a horizontal section of the sliding frame and gearing detached. v

The object of this invention is to obtain a simple and inexpensive attachment to machines for moulding irregular forms, bywhich the operator, while leaning over the table of the machine, and closely inspecting the operation of the cutter, will be enabled to adjust the cutter-head up or down to any required degree, without removing his eye from his work. i

In machines for-moulding, planing, &c., heretofore in use, the cutter-head has been made adjustable vertically by means of a sliding frame, operated by a hand-screw, set-screws, or some similar device. Such handscrew has, however, been placed under the table, with no means for operating it,pexc`e pt by leaving ,theworkn and stooping down to adjustthe-screw. Meanwhile the work is suspended, and perhaps considerable .delay and difficulty are experienced in gettingthe parts to their proper positionagain for-continuing the operation of the machine. Y 4

This machine is for the purpose of avoiding all these diiculties, and of enabling the workman to adjust his cutter-head during-the operation of the machine. l

IIn the drawings, A is Ithe table, and B B the supporting-frame of the machine, and C is the mandrel to which the cutter-head is attached, having on it a pulley, c, by which it is driven. This mandrel bears in a vertically-sliding frame, D, which moves up and down in a socket or guidesE E, and can be adjusted and held at any desired elevation by means of a screw-shaft, F, which has its fixed bearing in the guide-frame, and screws through a lug on the sliding adjustable frame, thereby moving the latter vertically. On the lower end of the screw-shaft is a spur-wheel, G, gearing into as maller spur-wheel, k, on the lower end of an upright shaft, H'. l1. is a small bevel-wheel, on the upper extremity of the shaft H, gearing into' a similar wheel, z', on the en d of la. horizontal shaft, I, which passes through and bears in the frame B of the machine, terminating under the' edge of the table A, in'a convenient position to beeasily within reach of the workman while bending over his work and closely examining theoperation of the cutter-head. J is a hand-wheel or crank, by which the shaft vI can be-rotated at pleasure. Y

The operation of this device will hardly need further description. It is evident that, by turning the hand.-V wheel J, the cutter-head can be raised'or depressed at pleasure, without the necessity of the operators taking his attention from his work` fora moment, and during the very midst of the process of moulding the'most delicate forms and lines, the cutter-head can be adjusted without in the slightest degree' interrupting the work.

v I do not claim broadly the use of hand-wheels for the purpose of adjusting cutters, as I am aware that they have heretofore been used upon a variety of machines, but never to my knowledge have they been applied and 4arranged as I propose. A i Y Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The described arrangement of the hand-wheel J, at the side of the machine, under the edge ofthe table A, the bevelled gearing h z', shaft H, pinion-wheels G, screw F, vertically-slidiug mandrel-frame D, andguides E, vas herein set forth, for the purpose specified.

To the above specification of my invention, I have signed my hand, this'lSth day of April, 1868.

y 4 J. P. GROSVEN OR.

Witnesses:

CnAs. A. Pa'r'rrr, Sonon C. Kanon. 

